Quick HowTo: Start with left button to get your position. Your position will be tracked as long as it is switched on. Use search to start searching. Delete the prevoius search markers with the „X“ button. The search starts in the middle of the map. So simply zoom and move the map to search where ever you like - worlwide. You  find more search results by simply searching the same item again. The search continues until it finds results, If the search reaches 100+ results, the search radius will be set reseted. 

Some things you can find:

Playground

Public Toilets

Tourist Info

Parks

Miniature golf

Biergarden (Germany)

Fastfood Restaurants

Marketplaces

Public Telephones

Kiosks

Toy Shops

Museums

Theme Parks

Zoos

Historic Places

Castles

Swimming facilities

Water Parks

Tennis Grounds

Camp Sites

Hostels

View Points

Parking

Restaurants

Coffeeshops

and much more.

The application offers following functions: 

Localize and track your position. Move the search target on the map. Show the search result on OpenStreetMap.

If you want to edit OpenStreetMap on the iPhone, you might give iLOE a try.

iLOS is the abbreviation for „iPhone Little OpenStreetMap Searcher“

The search result is based on OpenStreetMap: Map and data is (c) by OpenStreetMap and contributors, CC-BY-SA. iLOS uses the Route-Me library which is copyright (c) 2008-2010 by Route-Me Contributors

OpenStreetMap data is growing daily through thousands of contributors. See: http://openstreetmap.org. Support OpenstreetMap.org.